WO2014087202A1 - Composition et procédé pour la libération prolongée de macroéléments agricoles - Google Patents

Composition et procédé pour la libération prolongée de macroéléments agricoles Download PDF

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Publication number
WO2014087202A1
WO2014087202A1 PCT/IB2012/057080 IB2012057080W WO2014087202A1 WO 2014087202 A1 WO2014087202 A1 WO 2014087202A1 IB 2012057080 W IB2012057080 W IB 2012057080W WO 2014087202 A1 WO2014087202 A1 WO 2014087202A1
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WIPO (PCT)
Prior art keywords
urea
hap
nanoparticles
macronutrient
plant
Prior art date
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PCT/IB2012/057080
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English (en)
Inventor
Nilwala Kottegoda
Gayan Priyadharshana
Chanaka Sandaruwan
Damayanthi DAHANAYA
Sunanda Gunasekara
A. J. Gehan Amaratunga
Veranja Karunaratne
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Sri Lanka Institute Of Nanotechnology (Pvt) Ltd
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Application filed by Sri Lanka Institute Of Nanotechnology (Pvt) Ltd filed Critical Sri Lanka Institute Of Nanotechnology (Pvt) Ltd
Priority to PCT/IB2012/057080 priority Critical patent/WO2014087202A1/fr
Publication of WO2014087202A1 publication Critical patent/WO2014087202A1/fr
Priority to PH12015501297A priority patent/PH12015501297A1/en

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    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B19/00—Granulation or pelletisation of phosphatic fertilisers, other than slag
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05B—PHOSPHATIC FERTILISERS
    • C05B17/00—Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C9/00—Fertilisers containing urea or urea compounds
    • C05C9/005—Post-treatment
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/30—Layered or coated, e.g. dust-preventing coatings
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/40—Fertilisers incorporated into a matrix
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/45—Form not covered by groups C05G5/10 - C05G5/18, C05G5/20 - C05G5/27, C05G5/30 - C05G5/38 or C05G5/40, e.g. soluble or permeable packaging

Definitions

  • This invention relates to a composition for and a method of providing sustained release of agricultural nutrients. More particularly this invention relates to nitrogen containing macronutrient adsorbed hydroxyapatite phosphate (HAP) nanoparticles and a method of using nitrogen containing macronutrient adsorbed hydroxyapatite phosphate nanoparticles as a slow-release fertilizer.
  • HAP macronutrient adsorbed hydroxyapatite phosphate
  • N nitrogen
  • P phosphorous
  • K potassium
  • Ca calcium
  • Mg magnesium
  • S sulfur
  • micronutrients required in small amounts for plant growth are boron (B), chlorine (CI), manganese (Mn), iron (Fe), zinc (Zn), copper (Cu), molybdenum (Mo) and selenium (Se).
  • slow release fertilizers are improved efficiency and quality as the fertilizer is released over time, thus providing sufficient quantities of macronutrients as required for higher crop yields.
  • slow release fertilizers result in reduced environmental damage from leaching of macronutrients into water and emissions as gasses, compared to conventional water soluble fertilizers.
  • NUE Nitrogen Use Efficiency
  • US 6,261 ,997 B1 to Rubin et al. discloses slow release of pesticides adsorbed on organically modified clay to prevent leaching in underground and surface water.
  • US 4,219,349 to Bardsley discloses compositions of calcined clay granules and solution or suspension containing micronutrients (Fe, Zn, Mn, Cu, B, Mo, CI and S).
  • US 6,261 ,997 B1 to Rubin et al. discloses slow release of pesticides adsorbed on organically modified clay to prevent leaching in underground and surface water.
  • US 4,219,349 to Bardsley discloses compositions of calcined clay granules and solution or suspension containing micronutrients (Fe, Zn, Mn, Cu, B, Mo, CI and S).
  • 4,849,006 to Milburn et al. discloses a controlled release composition comprising of an organic, biologically active material absorbed on an organically modified clay.
  • US 6,821 ,928 B2 to Ruskin discloses a method to reduce the rate of diffusion of slow release materials through polymers and a process for making drip irrigation devices with long term control of root growth. It further, discloses bioactive material such as herbicide that is intercalated into nanoclays to protect against root intrusion in drip irrigation applications.
  • US 3,902,886 to Banin et al. discloses clay attached micronutrients to provide micronutrients to plants.
  • US2009/0169524 A1 to Kalpana et al. discloses biopolymer based nanocomposites of chitosan, montmorillonite (MMT) and hydroxyapatite for bone growth in medical applications. Solutions are needed to provide slow release macronutnent formulations for plant growth applications.
  • a nitrogen containing macronutrient is adsorbed on HAP nanoparticles and used as a fertilizer.
  • the macronutrient adsorbed HAP nanoparticles disclosed herein when applied to aqueous and terrestrial environments, slowly release the macronutrient to the soil.
  • the soil medium acts as a conduit for providing the transport of the macronutrients such as urea to the roots of the plant.
  • Figure 1 SEM images of an embodiment of the present invention showing the urea adsorbed HAP nanoparticles prepared by template method (a) as synthesized and (b) after 2 hrs of synthesis, resulting as a solid chip, showing nanobeads and bead- chain-like structures obtained by the directional growth of nanobeads, respectively.
  • Figure 2 SEM images of an embodiment of the present invention where showing the urea adsorbed HAP nanoparticles foliage formulations prepared with HAP:Urea (a) 1 :1 , (b) 1 :3, (c) 1 :4, (d) 1 :5 and (e) 1 :6.
  • Figure 3 TEM images of an embodiment of the present invention showing (a) synthesized HAP nanoparticles and (b) urea adsorbed HAP nanoparticles.
  • Figure 4 SEM image of an embodiment of the present invention showing the bead- chain-like structure of the HAP-urea nanoparticles formed by the Sol-Gel method.
  • Figure 5 Crystallographic representation of HAP nanoparticles.
  • Figure 6 Schematic representation of the directional growth of nanobead like nanoparticles into bead-chain-like particles.
  • Figure 7 SEM images of HAP nanoparticles formed with different addition rates of phosphoric acid, (a) 250 ml min “1 , (b) 70 ml min “1 , (c) 20 ml min “1 and (d) 6 ml min “1 .
  • Figure 8 SEM images of HAP nanoparticles formed at different pH values (a) 5, (b) 7, (c) 9 and (d) 1 1.
  • Figure 9 SEM images of HAP nanoparticles prepared by (a) drop wise addition and (b) spray addition methods.
  • FIG. 10 SEM images of HAP nanoparticles prepared with different stirring speeds
  • Figure 1 1 SEM images of HAP nanoparticles prepared at different reaction temperatures (a) 10 °C, (b) 25 °C, (c) 70 °C, (d) 85 °C and (e) 100 °C.
  • Figure 12 SEM images of the HAP nanoparticles prepared using (a) 0.6 M and (b) cone, phosphoric acid.
  • Figure 13 PXRD patterns for Urea, an embodiment of the present Urea-HAP nanoparticle composite invention and HAP nanoparticles.
  • Figure 14 Electron diffraction patterns of (a) HAP nanoparticles and (b) an embodiment of the present Urea-HAP nanoparticle composite invention.
  • Figure 15 FTIR spectra for the carbonyl stretching region of (a) HAP nanoparticles (b) an embodiment of the present Urea-HAP nanoparticle composite invention and (c) Urea.
  • Figure 16 FTIR spectra for the amine stretching region of (a) HAP nanoparticles (b) an embodiment of the present Urea-HAP nanoparticle composite invention and (c) Urea.
  • Figure 17 FTIR spectra for the N-C-N stretching region of (a) HAP nanoparticles (b) an embodiment of the present Urea-HAP nanoparticle composite invention and (c) Urea.
  • Figure 18 Raman spectra of (a) Urea, (b) HAP nanoparticles and (c) an embodiment of the Urea-HAP nanocomposite of the present invention.
  • Figure 19 Release behavior comparison for Urea, Urea-HAP nanoparticle chip, Urea-HAP nanoparticle powder and Urea and HAP macroparticles in water.
  • Figure 20 Release behavior comparison in water for (a) Urea; embodiment of the present Urea-HAP nanoparticle composite invention with HAP :Urea (b) 1 :1 , (c) 1 :3, (d) 1 :4, (e) 1 :5 and (f) 1 :6 in liquid phase.
  • Figure 21 Release behavior comparison for Urea and embodiments of the present Urea-HAP nanoparticle chip invention, in soil.
  • Figure 22 Rice plant height/cm vs. treatments 1-4.
  • Figure 23 Number of tillers per pot vs. treatments 1 -4.
  • Figure 24 Number of days to flower vs. treatments 1-4.
  • Figure 25 Number of panicles per pot vs. treatments 1-4.
  • Figure 26 1000 grain weight g vs. treatments 1-4.
  • Figure 27 Number of filled grains per pot vs. treatments 1-4.
  • Figure 28 Grain weight g per pot vs. treatments 1 -4. DETAILED DESCRIPTION
  • slow release of macronutrients provides the plant with nutrients gradually over an extended period of time. As described herein in further detail, such an extended period of time can be up to three months. Soils applied with slow release fertilizer that contain macronutrients will require fewer applications of such fertilizer. Use of a slow release fertilizer leads to higher efficiency of macronutrient release compared to conventional fast release fertilizers.
  • Adsorption refers to any means that forms a complex between the nitrogen containing macronutrient compound and the hydroxyapatite phosphate (“HAP" or ⁇ ”) nanoparticles. These include covalent bonds, electrostatic bonds, Van der Waals bonds and hydrogen bonds.
  • any other nitrogen containing substance which can deliver nitrate or nitrite to the plant can be used as the macronutrient for adsorption onto the HAP nanoparticles.
  • nitrogen containing substances include, but are not limited to, urea, thiourea, amides, polyamines, ammonia and alginates. Overview of Manufacture and Morphology of HAP Nanoparticle - Nitrogen
  • HAP nanoparticles can be chemically synthesized using calcium hydroxide suspension and phosphoric acid (Mateus et al., Key Engineering Materials, 330-332, 243-246, 2007). A more detailed description of the synthesis of HAP nanoparticles is described herein.
  • Structural morphology of the HAP-nanoparticles described herein indicates an initial formation of bead-like HAP nanoparticles that grow into a bead-chain-like structures.
  • This growth pattern suggests that one face of the bead-like HAP nanoparticle is possibly crystallized with a hexagonal unit cell and is highly energetic thus leading to a directional growth along one orientation.
  • This directional growth may occur through the P0 4 2" terminating plane. (See Figures 5 and 6).
  • the directional growth is interrupted or delayed in the presence of spacer molecules such as amines and amides in the medium because Ca 2+ may complex with the nitrogen donor. Methods for adsorption of nitrogen containing macronutrient compounds such as urea on the HAP nanoparticles are also described herein.
  • SEM imaging indictes particle size of less than 30 nm for a preferred embodiment of macronutrient adsorbed HAP nanoparticles.
  • TEM imaging see Figures 3a and 3b
  • a preferred embodiment of macronutrient adsorbed HAP nanoparticles displays rod-like morphology similar to the HAP nanoparticles prior to adsorption.
  • FTIR and Raman indicate that, in a preferred embodiment of these nanoparticles, urea is attached to the hydroxyl terminating and Ca 2+ terminating faces of the HAP nanoparticles.
  • HAP-nitrogen containing macronutrient nanoparticles prior to drying, HAP-nitrogen containing macronutrient nanoparticles can be obtained as a stable aqueous dispersion. After drying, the HAP-nitrogen containing macronutrient nanoparticles can be obtained as a white solid chips or granules. Furthermore, these chips or granules can be ground to provide a powder. This grinding preferably takes place using a roll mill or a ball mill. The aqueous dispersions, chips or granules can be used as slow release macronutrient formulations. Release behavior in soils
  • the macronutrient-adsorbed HAP nanoparticles disclosed herein can be used for supplying macronutrients for crops such as tea; rubber; coconut; soybeans; cotton; tobacco; sugar cane; cereals such as rice, corn (maize), wheat, sorghum and wheat; fruits such as apples, oranges, tomatoes; vegetables; ornamental plants; and other short term cash crops that grow in a range of pH soils.
  • crops such as tea; rubber; coconut; soybeans; cotton; tobacco; sugar cane; cereals such as rice, corn (maize), wheat, sorghum and wheat; fruits such as apples, oranges, tomatoes; vegetables; ornamental plants; and other short term cash crops that grow in a range of pH soils.
  • Nitrogen-containing fertilizer is needed because production of crops removes nitrogen, which is essential for plant growth, from the soil. For example, the production of 1000 kg of tea leaves (dry weight) removes up to 100 kg of nitrogen from soil. This nitrogen has to be replenished by external application of fertilizer.
  • the nitrogen containing macronutrient adsorbed HAP nanoparticle composition described herein can be applied to the soil in the form of a powder, pellets, chips, a spray, or as an aqueous dispersion encapsulated within a biodegradable coating.
  • a slow release of nitrogen over a period up to three months is observed.
  • the frequency of application can be attenuated depending on the fertilizer requirement of a given tea plantation. This can be done by starting a second round of application at a suitable period prior to reaching the end of the viability of the first application of the macronutrient adsorbed HAP nanoparticles.
  • multiple applications of the macronutrient-adsorbed HAP nanoparticles are distributed on soils within three months.
  • soil pH plays a role in the release behavior of the macronutrients from the macronutrient-adsorbed HAP nanoparticles to the soil.
  • soil pH is important in the growth of economic plants (Rice, Tea and Rubber) and ornamental plants (Ferns and Orchids).
  • tea plants thrive in acidic soils in the pH range between about 4.2 to 5.7.
  • rice is more tolerant of slightly higher pH the ideal range being between about 5.0 - 6.0. It is believed that high organic matter content in soil could lead to lowering of pH of the soil. Elevation may play a role in the effect. In general, higher elevations contain more organic matter compared to lower elevations such as sea level. Organic matter content of soil between 1600 to 4000 feet elevation can range from 2 to 3%.
  • soil having a pH of 5 found at about 1600 feet from tea plantations in Kandy, Sri Lanka can be used with macronutrient adsorbed HAP nanoparticles to release the macronutrient in a slow and sustained manner.
  • pot trials carried out with rice at the Rice Research and Development Institute, Sri Lanka can be used with macronutrient adsorbed HAP nanoparticles to slowly release the macronutrient.
  • soils having acidic pH values in the range between about 4.2- 6.5 are most preferred.
  • the aqueous dispersion obtained directly after the synthesis of the HAP-nitrogen containing macronutrient nanoparticles can be used to slowly release the macronutrient in foliar applications. Since leaf surface chemistry generally has a pH range between 5 and 7, such an aqueous formulation can release macronutrient as a foliar application in a local setting through manual application or on a wider scale by aerial spraying. These applications can be made multiple times during the life cycle of a plant as necessary.
  • HAP-urea nanoparticles were prepared with HAP:Urea ratios of 1 :3, 1 :4, 1 :5 and 1 :6 resulting in a foliage fertilizer formulation.
  • bead like nanoparticles (diameter 10 - 20 nm with uniform size) formed.
  • the orientation attachment or directional growth was delayed as a result of the presence of surface modifiers such as amines, di-amines and amide group containing organic molecules which delay the directional growth of bead-like nanoparticles.
  • surface modifiers such as amines, di-amines and amide group containing organic molecules which delay the directional growth of bead-like nanoparticles.
  • the beadlike particles attach in to the same bead-chain-like structure as observed with sol-gel synthesis method (described below), (10 - 15 nm diameter, 30 - 150 nm length).
  • template molecule referred to herein is a heteroatom containing organic molecule such as an amine or an amide
  • directional growth of bead-like particles was controlled, resulting in a higher surface area in the nanostructures.
  • Higher nanostructure surface area is preferred for more effective coating of plant nutrients and to increase the loading of nutrients onto the HAP.
  • H 3 PO4 (0.6 M, 250 ml) was added drop-wise into a suspension of calcium hydroxide (19.29 g Ca(OH) 2 in 250 ml water), while stirring vigorously under mechanical agitation (1000 rpm). HAP-nanoparticle dispersion is created. The reaction takes place according to the following equation.
  • HAP nanoparticle synthesis was repeated at different experimental conditions varying the following parameters:
  • HAP nanoparticles with urea were carried out as described below.
  • Urea solution (1 M, 250 ml) was added drop wise into the above-prepared HAP nanoparticle dispersion.
  • 25 g of solid urea is added to the HAP dispersion.
  • solid urea reduces the amount of water in the mixture, improving the drying process.
  • the resulting solution was allowed to age further for 2 hrs at room temperature to yield a stable dispersion, which can be used for foliar applications or encapsulated within a biodegradable coating. Afterwards, the dispersion was dried at 60 °C overnight by use of oven drying or flash drying.
  • Morphology of HAP - Urea Nanocomposite Sol-Gel Method
  • FIG. 3(a) is a TEM image of HAP-urea nanocomposites. These HAP-urea nanocomposites were created by the Sol-Gel method described in Example 2 above.
  • Bead-like HAP nanoparticles with a diameter of approximately 10-35 nm were initially formed. Quick directional growth leading to bead-chain-like structures with 10 - 35 nm diameter and 150 nm length occurred with faster addition rates of phosphoric acid. Bead-chain-like morphology was observed for addition rate of 20 ml min "1 . Bead-chain-like morphology with a particle diameter of 10-60 nm, was observed for the slower rates 6 ml min "1 . Bead-chain-like nanostructures were longer in length with the decrease in the addition rate of phosphoric acid suggesting that the longer time duration allows more efficient directional growth of bead-like nanoparticles. It is most preferable for the fertilizer application disclosed herein to use the addition rate of 70 ml min "1 .
  • phase pure nanoparticles with a bead-chain-like morphology were observed for both the drop wise and spray methods of addition.
  • Smaller particles (diameter 10-40 nm) with more uniform particle size distribution were observed for the more preferable spraying method.
  • the size and morphology of the particles used with concentrated phosphoric acid was similar to the bead-chain-like nanoparticles (diameter 10 - 50 nm, 50 -200 nm length) observed with 0.6 M phosphoric acid. It is more preferable to use concentrated phosphoric acid.
  • Table 1 BET surface area, pore size and pore volumes of the HAP nanoparticles and U-HA nanocomposites.
  • the HAP nanoparticles synthesized as described in this study have a significantly high surface area compared to literature values.
  • the directional growth of bead-like nanoparticles into a bead-chain-like nanostructure may have introduced the observed unique features.
  • the number of layers of urea molecules around one HAP nanoparticles calculated referring to the BET was 53, suggesting the presence of a nanocomposite where HAP nanoparticles are surrounded by urea molecules which are H-bonded to each other in an extended fashion representing a poly urea molecule.
  • HAP-Urea nanoparticle composite with a ratio of 1 :1 displayed the slowest release behavior compared to the other formulations with higher urea loadings.
  • a similar pattern in rate of release of urea was observed with all the other formulations with different urea loading.
  • the presence of increased urea amounts may weaken the H-bonding interactions between the urea molecules and HAP nanoparticles.
  • the rate of release of urea in solution phase composite was significantly slower than that of the Urea-HAP nanoparticle composite obtained as solid chips.
  • Soil sample 400 g each of soil found at an elevation of 1600 feet in a tea plantation; pH 5.0 was mixed with 1 .8 g of commercial urea fertilizer.
  • the soil sample containing urea fertilizer was filled into a glass column.
  • three equal amounts of Urea-HAP nanoparticle composite N - 15.5% having a N content equal to urea, were taken separately and filled into three glass columns containing three soil samples (three replicates).
  • 180 ml water was added to all four soil columns until they reached the soil water saturation point, and maintained the water content approximately constant throughout the period of study. Water (100 ml) was added at five day intervals prior to elution.
  • the eluted solutions 50 ml) were collected for nitrogen analysis. Nitrogen analysis was done by the Kjeldhal (N) method.
  • nanocomposite based on Urea-HAP nanoparticle and gradual release behavior can be clearly identified with the increasing of cumulative nitrogen content up to 80 th day in a slow manner, which is in agreement with a typical slow release profile presented by cumulative release vs. time in the literature.
  • urea composition had released almost 50 % of N within 25 days and release of nitrogen had leveled off at 70 % after the 50 th day. Only 60% of the urea was released even after the 80 th day and the results were highly reproducible.
  • one basal treatment of the nanparticle composite was sufficient to meet the nitrogen demand of the plant during the total life span, compared with three biweekly applications in addition to the basal treatment when the conventional urea system (recommended by the Department of Agriculture, Sri Lanka).

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Fertilizers (AREA)

Abstract

L'invention porte sur une composition d'engrais dans laquelle un macroélément contenant de l'azote est adsorbé sur la surface de nanoparticules de phosphate de type hydroxyapatite. Ladite composition d'engrais libère lentement le macroélément contenant de l'azote dans le sol.
PCT/IB2012/057080 2012-12-07 2012-12-07 Composition et procédé pour la libération prolongée de macroéléments agricoles WO2014087202A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/IB2012/057080 WO2014087202A1 (fr) 2012-12-07 2012-12-07 Composition et procédé pour la libération prolongée de macroéléments agricoles
PH12015501297A PH12015501297A1 (en) 2012-12-07 2015-06-08 Composition and method for sustained release of agricultural macronutrients

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PCT/IB2012/057080 WO2014087202A1 (fr) 2012-12-07 2012-12-07 Composition et procédé pour la libération prolongée de macroéléments agricoles

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104151044A (zh) * 2014-07-19 2014-11-19 安徽德昌苗木有限公司 一种油茶抗菌栽培袋料
ITUB20150913A1 (it) * 2015-05-28 2016-11-28 Bio Eco Active S R L Composizioni concimanti a base di un composto inorganico sostituito con micro e macroelementi
EP3205637A1 (fr) * 2016-02-10 2017-08-16 Martin Heinisch Engrais aqueux contenant des nanoparticules métalliques
US11285472B2 (en) 2013-01-28 2022-03-29 Bfp Management, Llc Fertilizer composition and method for suspending fertilizer in an aqueous solution
WO2022180504A1 (fr) * 2021-02-24 2022-09-01 University Of Sri Jayewardenepura Procédé de fabrication d'une composition de nano-engrais pour la libération prolongée de macronutriments
WO2023126405A1 (fr) 2021-12-27 2023-07-06 Omya International Ag Composition liquide foliaire

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040231231A1 (en) * 2002-12-20 2004-11-25 Cataldo Dominic A. Use of colloidal clays for sustained release of active ingredients
US20100215556A1 (en) * 2006-11-02 2010-08-26 Industrial Science & Technology Network Inc. Nanopore reactive adsorbents for the high-efficiency removal of waste species
US20110296885A1 (en) * 2010-06-05 2011-12-08 Sri Lanka Institute of Nanotechnology (Pvt) Ltd. Compositions for sustained release of agricultural macronutrients and process thereof
US20110296887A1 (en) * 2010-06-07 2011-12-08 Sri Lanka Institute of Nanotechnology (Pvt) Ltd. Cellulose based sustained release macronutrient composition for fertilizer application

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040231231A1 (en) * 2002-12-20 2004-11-25 Cataldo Dominic A. Use of colloidal clays for sustained release of active ingredients
US20100215556A1 (en) * 2006-11-02 2010-08-26 Industrial Science & Technology Network Inc. Nanopore reactive adsorbents for the high-efficiency removal of waste species
US20110296885A1 (en) * 2010-06-05 2011-12-08 Sri Lanka Institute of Nanotechnology (Pvt) Ltd. Compositions for sustained release of agricultural macronutrients and process thereof
US20110296887A1 (en) * 2010-06-07 2011-12-08 Sri Lanka Institute of Nanotechnology (Pvt) Ltd. Cellulose based sustained release macronutrient composition for fertilizer application

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KOTTEGODA, NILWALA ET AL.: "A green slow-release fertilizer composition based on urea-modified hydroxyapatite nanoparticles encapsulated wood", CURRENT SCIENCE, vol. 101, no. 1, 10 July 2011 (2011-07-10), pages 73 - 78 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11285472B2 (en) 2013-01-28 2022-03-29 Bfp Management, Llc Fertilizer composition and method for suspending fertilizer in an aqueous solution
CN104151044A (zh) * 2014-07-19 2014-11-19 安徽德昌苗木有限公司 一种油茶抗菌栽培袋料
ITUB20150913A1 (it) * 2015-05-28 2016-11-28 Bio Eco Active S R L Composizioni concimanti a base di un composto inorganico sostituito con micro e macroelementi
WO2016189521A3 (fr) * 2015-05-28 2017-03-16 Bio Eco Active S.R.L. Compositions fertilisées à base de composé de carbonate de calcium et/ou de phosphate de calcium substitué
EP3205637A1 (fr) * 2016-02-10 2017-08-16 Martin Heinisch Engrais aqueux contenant des nanoparticules métalliques
WO2022180504A1 (fr) * 2021-02-24 2022-09-01 University Of Sri Jayewardenepura Procédé de fabrication d'une composition de nano-engrais pour la libération prolongée de macronutriments
WO2023126405A1 (fr) 2021-12-27 2023-07-06 Omya International Ag Composition liquide foliaire

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